Separable joint for display-figures.



L. WULKAN & K. GLASS. SEPARABLE JOINT FOR DISPLAY FIGURES. APPLICATION FILED MAR. 27. I9I4. 1,134,716. Patented Apr. 6, 1915,

'. 11E arms "non.

LOUIS WULKAN, OF CEDARHURST, AND KALLMANN GLASS, OF NEW YORK, N. Y.

SEPARABLE JOINT FOR DISPLAY- FIGURES.

AppIication filed March 27,

To all whom it may concern Be it known that we, LOUIS WULKAN, a citizen of the United States, and resident of Cedarhurst, Nassau county, and State of.

New York, and KALLMANN GLAss, a citizen of the United States, and resident of the city of New York, Bronx county, and State of New York, have invented certain new and useful Improvements in Separable Joints for Display-Figures, of which the following is a specification.

This invention relates to an artificial limb construction for display figures and more particularly to the construction of the joints.

The object of the invention is to provide a simple and cheap construction for a separable joint which shall permit movement in every direction and also to provide means for adjustment of the same.

In the drawings accompanying this application, like parts in the several views have been given the same reference numerals.

Figure 1 is a perspective view of a portion of an artificial limb showing the joint. Fig. 2 is an enlarged sectional elevation taken on the line 2-2 of Fig. 3. Fig. 3 is a crosssectional view on the line 33 of Fig. 2.

A portion of an arm member is shown at 1 and is provided at its end with a socket in which a ball 2 is received. A spring 3 extends into a longitudinal recess in the arm member 1 and is provided with an extending shank by means of which it is pivotally attached to the ball 2 at 1. The ball 2 is provided with suitable means, such as the screw threaded portion 5, for attachment to the other arm member, or the ball may be formed as a part thereof.

Curved levers 6 and 7 are pivotally mounted at 8 and 9, respectively, in an annular recess extending around the arm member 1 and a transverse opening extending into said longitudinal recess. These levers are provided with inwardly projecting engaging portions or points 10 andll, respectively, which, when the levers are in their closed or operative position, as shown in Figs. 2 and 3, engage between the convolutions of the spring 3 as the same is positioned in the recess in the arm member 1. The levers 6 and 7 are normally held in their closed or operative position by means of the springs 14 and 15, respectively, which are positioned beneath the outer ends thereof. Buttons 12 and 13 are mounted'upon the outer ends of the levers 6 and 7, respectively, and project Specification of Letters Patent.

1914. Serial No. 827,549.

through openings in the inclosing band 16 and provide means for operating the levers by simply pressing the same inwardly by hand. The arm members are connected to- Patented Apr. 6,1915. I

gether by first pressing the buttons 12 and 13 inwardly, thus moving the levers 6 and 7 with the engaging portions 10 and 11 to thelr inoperative position, then inserting the spring 3 1n the longitudinal recess in the arm member 1 and releasing the buttons 12 1 and 13. The springs 14: and 15 move the levers 6 and 7 to their operative positions with the portions 10 and 11 engaged between the convolutions of the spring 3, as shown in the drawings. By rotating" the arm members relatively to each other the spring is caused to act as a screw and the joint is thus readily tightened to any clesired degree, either to hold the same in a fixed position or, more loosely, to'permit' a free movement thereof.

As the arm members are usually constructed of wood the shrinkage would cause the joint to become loose but this is overcome by simply tightening the joint by rotating the arm members as described, to take up the looseness caused by shrinkage or wear. It will thus be seen that this construction provides not only for a quick adjustment of the joint but also for quickly attaching or detaching the arm members by simply releasing the engaging members from the spring, in the manner described, and separating the joint.

It will be understood that the details of construction as shown may be modified or varied to adapt the same for use with different forms of joint constructions as well as for various other uses to which the invention is applicable.

What we claim is 1. In a joint for artificial limbs, in combination, an arm member provided with a spherical portion at one end, an arm mem ber provided with a socket adapted to receive said spherical portion, one of said arm members being provided with a longitudinal recess, and a transverse opening extending thereinto, a spring attached to the other of said arm members and extending into said recess, and a curved lever pivotally mounted on and extending around one of said arm members and having an engaging portion extending through said transverse opening into the said longitudinal recess therein adapted to be moved into engagement With said spring to hold said arm members together and to be moved out of engagement therewith to release said spring and permit the arm members to be separated.

2. In a joint for artificial limbs, in combination, an arm member provided With a spherical portion at one end, an arm member provided With a socket adapted to receive said spherical portion, one of said arm members being provided With a longitudinal recess, and an annular recess extending around the same and a portion extending into said longitudinal recess, a spring attached' to the other of said arm members and extending into said longitudinal recess, and a curved lever pivotally mounted in said annular recess extending around one of said arm members and having an engaging portion extending into the said longitudinal recess therein adapted to be moved into en gagement With said spring to hold said arm members together and to be moved out of engagement therewith to release said spring and permit the arm members to be separated.

3. In a joint for artificial limbs, in combination, an arm member provided With a spherical portion at one end, an arm mem- Copies of this patent may be obtained for five cents each,

ber provided with a socket adapted to receive said spherical portion, one of said arm members being provided With a longitudinal recess and an annular recess extending around the ne and having portions extending into said. longitudinal recess, sm'ing attached to the other of said arm members and extending into said longitudinal recess, and a pair of curved levers pivotally mounted in said annular recess eX- tending around one of said arm members on opposite sides thereof and each having an engaging portion. extending into said longitudinal recess therei adapted to be moved into engagement Wit said spring to hold aid arm members together and to be moved out of engagement therewith to release said spring and permit the arm members to be separated.

Signed at New York city, in the county and State of New York, this 26th day of iarch, 191st.

LOUIS lVULKAN.

ALLMANN GLASS.

i itnesses LEWIS J. DoomrTLn, LOUELLA F. LITTLE.

by addressing the Gemmissioner of latents,

Washington, D. G. 

